Abstract
An experiment was conducted at the experimental farm of BINA Sub-station, Gopalganj to determine the effect of spacing on the yield and yield attributing parameters of rice. Four spacings viz. 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were included in the study. The experimental design was a randomized completely block with three replications. Spacing’s 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were adopted 49, 42, 36 and 30 hills per square meter, respectively. Results revealed that different spacing performed significantly differed yield contributing characters (plant height, panicle length, number of effective and non-effective tillers, number of filled and unfilled grain, grain and straw yield of rice. Results indicated that the highest plant height (83.40 cm), panicle length (19.73), number of effective tillers per hill (11.00), number of total grains per panicle (87.73), number of filled grains per panicle (70.53), root length (16.07 cm), root weight (38.00 g per five plants), harvest index (38%), grain yield (4.19 t ha-1) and straw yield (4.50 t ha-1) were found with 25 cm × 20 cm spacing. On the other hand, maximum number of non-effective tillers per hill (1.60) was found in 15 cm × 15 cm spacing. Results of the present study revealed that 25 cm × 20 cm spacing was found to be the best for obtaining maximum grain yield of aus var. Binadhan-19.
 Res. Agric., Livest. Fish.6(3): 373-378, December 2019
Highlights
Rice (Oryza sativa L.) is the most important cereal food crop of the developing countries as the staple food of more than 3 billion people or more than half of the world’s population
Field experiment of rice was conducted at the experimental farm of Bangladesh Institute of Nuclear Agriculture (BINA) Sub-station, Gopalganj to determine the effect of different spacings on the yield and yield attributing characters of rice
Results showed that plant height increased with decreasing row spacing
Summary
Rice (Oryza sativa L.) is the most important cereal food crop of the developing countries as the staple food of more than 3 billion people or more than half of the world’s population. In Bangladesh, researchers are developed new rice varieties to feed our over growing people. Spacing is one the most important factor of management practices to increase rice production because rice growth is known to be affected both qualitatively and quantitatively by plant population densities. Other authors (Weewaroth et al, 1979; Bishnu et al, 2013) have reported that wider spacing (25 cm × 25 cm, and 30 cm × 30 cm) produced significantly higher rice tillers, panicles per square meter, longer and weighty panicles, and higher grain yield than closer spacing (15 cm × 15 cm). Research is needed to determine the effective spacing for increasing yield of Binadhan-19 rice. A field experiment was conducted to determine the optimum spacing to popularize the newly developed rice variety (Binadhan-19) among the farmers of Bangladesh
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